Air Conditioner Cover Universal 28x28 Steel 6x4 air return grille with

6x4 air return grille with pre-filter

The matte gray powder-coated finish is a versatile neutral that bridges light and dark floor palettes

Feature Specification Manufacturer Green Vent Product Type Aluminum Linear Slot Diffuser Duct Opening Size 10" × 6" Neck Size 9-3/4" × 5-3/4" Overall Face Size 11-3/4" × 7-3/4" Color / Finish Black / Powder-coated Material Alloy Aluminum Shape Rectangular Installation / Mounting Type Screw-In for wall/ceiling

Can I use a filter with this vent cover

Neck size: 5-3/4" × 5-3/4"

Air Conditioner Cover Universal 28x28 Steel 6x4 air return grille withKEEPS DEBRIS OUT Fine mesh design prevents leaves, pine needles, and other debris from clogging your AC unit, ensuring smooth operation all year round. DURABLE CONSTRUCTION Made from high quality, weather resistant materials, this cover withstands harsh conditions, providing long lasting protection for your AC unit. EASY TO INSTALL Quick and simple to set up with secure bungee cords, allowing you to protect your AC unit in just a minute. MAINTAINS